842774477247 has 12 divisors (see below), whose sum is σ = 1235510179800. Its totient is φ = 553463835408.

The previous prime is 842774477239. The next prime is 842774477249. The reversal of 842774477247 is 742774477248.

842774477247 is a `hidden beast` number, since 84 + 2 + 7 + 7 + 447 + 72 + 47 = 666.

It is not a de Polignac number, because 842774477247 - 2³ = 842774477239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842774477249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698817372 + ... + 698818577.

It is an arithmetic number, because the mean of its divisors is an integer number (102959181650).

Almost surely, 2^842774477247 is an apocalyptic number.

842774477247 is a deficient number, since it is larger than the sum of its proper divisors (392735702553).

842774477247 is a wasteful number, since it uses less digits than its factorization.

842774477247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397636022 (or 1397636019 counting only the distinct ones).

The product of its digits is 137682944, while the sum is 63.

Subtracting from 842774477247 its reverse (742774477248), we obtain a palindrome (99999999999).

The spelling of 842774477247 in words is "eight hundred forty-two billion, seven hundred seventy-four million, four hundred seventy-seven thousand, two hundred forty-seven".